I remember the first time I tried to use the tangerine technique...let's just say it wasn't working.
My visualization (this is graphic) was that a nail was in the back of my head. It was holding up a sign that said, "Concentrate, stupid!" Believe it or not, this kind of worked.
That and the "picture you're standing just behind and above you" thing.
-Ramon http://razor.ramon.com ("No quote this time, guys...instead, check out this insane link that seems appropriate: http://www.cnn.com/2001/US/08/28/nail.in.head/" -Wow...just wow)
